Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Fail-safe Chart
FAIL-SAFE CHART
If any of the following DTCs are stored, the ECM enters fail-safe mode to allow the vehicle to be driven temporarily or stops fuel injection.
| DTC Code | Component | Fail-Safe Operation | Fail-Safe Deactivation Condition |
|---|---|---|---|
| P001100 P001107 P001500 P002100 P002107 P002500 | VVT system |
| Pass condition detected |
| P003012 P003013 P005012 P005013 P101A9E P103A9E | Air fuel ratio sensor heater | The ECM turns off the air fuel ratio sensor heater. | Engine switch off |
| P003612 P003614 P005612 P005614 P102A9E P105A9E | Heated oxygen sensor heater | The ECM turns off the heated oxygen sensor heater. | Engine switch off |
| P008700 P008800 P123513 | Fuel pump assembly (for high pressure side) |
| Engine switch off |
| P010012 P010014 | Mass air flow meter sub-assembly | The ECM calculates fuel injection volume according to the engine speed and throttle valve position. | Pass condition detected |
| P011011 P011015 | Intake air temperature sensor | The ECM estimates the intake air temperature to be 20°C (68°F). | Pass condition detected and then engine switch turned off |
| P011511 P011515 | Engine coolant temperature sensor | The ECM estimates the engine coolant temperature to be 80°C (176°F). | Pass condition detected |
| P012011 P012015 P01201C P022011 P022015 P060444 P060604 P060629 P060647 P060A47 P060B49 P060D49 P060E49 P061E49 P065714 P06579E P160700 P210018 P210019 P211172 P211173 P211900 P211904 P211977 P21352B | Electronic throttle control system | The ECM cuts off throttle actuator current and the throttle valve is returned to a 7° throttle position by the return spring. The ECM then adjusts the engine output by controlling fuel injection (intermittent fuel-cut) and ignition timing in accordance with the accelerator pedal angle to allow the vehicle to be driven at a low speed*1. | Pass condition detected and then engine switch turned off |
| P019011 P019015 | Fuel pressure sensor (for high pressure) |
| Pass condition detected and then engine switch turned off |
| P020113 P020213 P020313 P020413 P020513 P020613 P062D13 | ECM (injector driver) | The ECM performs fuel-cut when the engine speed is 2000 rpm or more. | Pass condition detected and then engine switch turned off |
| P030000 P030027 P030085 P030100 P030200 P030300 P030400 P030500 P030600 *2 |
| When a catalyst-damaging misfire occurs (MIL blinking), the following fail-safe operation is performed for catalyst overheat malfunction prevention.
| Pass condition detected and then engine switch turned off |
| P032511 P032515 P033011 P033015 | Knock control sensor | The ECM sets the ignition timing to maximum retard. | Engine switch off |
| P05042B | Stop light switch assembly | The accelerator pedal opening angle is fixed when there is an accelerator pedal malfunction or history of a malfunction. | Pass condition detected and then engine switch turned off |
| P056014 | ECM +B circuit | Generator command is maintained. | Pass condition detected and then engine switch turned off |
| P107A11 P107A15 | Fuel pressure sensor (for low pressure side) |
| Pass condition detected and then engine switch turned off |
| P21CF13 P21D013 P21D113 P21D213 P21D313 P21D413 | Fuel injector assembly (for port injection) | The ECM performs fuel-cut when the engine speed is 2000 rpm or more. | Pass condition detected and then engine switch turned off |
| P212012 P212014 P21201C P21201F P212099 P212512 P212514 P21251F P21382B | Accelerator pedal position sensor | The accelerator pedal position sensor has 2 sensor circuits: Main and Sub. If either circuit malfunctions, the ECM limits the engine output. If both circuits malfunction, the ECM regards the accelerator pedal as being released. As a result, the throttle valve is closed and the engine idles. | Pass condition detected and then engine switch turned off |
| P223711 P223712 P223713 P223716 P223717 P22371B P224011 P224012 P224013 P224016 P224017 P22401B P225111 P225112 P225411 P225412 | Air fuel ratio sensor | Air fuel ratio feedback control is stopped | Pass condition detected and then engine switch turned off |
HINT:
- *1: The vehicle can be driven slowly when the accelerator pedal is depressed firmly and slowly. If the accelerator pedal is depressed quickly, the vehicle may speed up and slow down erratically.
- *2: Misfire-related fail-safe operations occur when catalyst overheat malfunctions occur.
Check Mode Procedure
CHECK MODE PROCEDURE HINT: Compared to normal mode, check mode is more sensitive to malfunctions. Therefore, check mode can detect malfunctions that cannot be detected in normal mode. NOTICE: All the ...
Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. Th ...
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Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual
- For your information
- Pictorial index
- For safety and security
- Instrument cluster
- Operation of each component
- Driving
- Lexus Display Audio system
- Interior features
- Maintenance and care
- When trouble arises
- Vehicle specifications
- For owners
Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual
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